Document Detail


Anaerobic digestion of autoclaved and untreated food waste.
MedLine Citation:
PMID:  24238799     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
Anaerobic digestion of autoclaved (160°C, 6.2bar) and untreated source segregated food waste (FW) was compared over 473days in semi-continuously fed mesophilic reactors with trace elements supplementation, at organic loading rates (OLRs) of 2, 3, 4 and 6kg volatile solids(VS)/m(3)d. Methane yields at all OLR were 5-10% higher for untreated FW (maximum 0.483±0.013m(3) CH4/kgVS at 3kgVS/m(3)d) than autoclaved FW (maximum 0.439±0.020m(3) CH4/kgVS at 4kgVS/m(3)d). The residual methane potential of both digestates at all OLRs was less than 0.110m(3) CH4/kgVS, indicating efficient methanation in all cases. Use of acclimated inoculum allowed very rapid increases in OLR. Reactors fed on autoclaved FW showed lower ammonium and hydrogen sulphide concentrations, probably due to reduced protein hydrolysis as a result of formation of Maillard compounds. In the current study this reduced biodegradability appears to outweigh any benefit due to thermal hydrolysis of ligno-cellulosic components.
Authors:
Elina Tampio; Satu Ervasti; Teija Paavola; Sonia Heaven; Charles Banks; Jukka Rintala
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2013-11-15
Journal Detail:
Title:  Waste management (New York, N.Y.)     Volume:  -     ISSN:  1879-2456     ISO Abbreviation:  Waste Manag     Publication Date:  2013 Nov 
Date Detail:
Created Date:  2013-11-18     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9884362     Medline TA:  Waste Manag     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Copyright Information:
Copyright © 2013 Elsevier Ltd. All rights reserved.
Affiliation:
Bioenergy and Environment, MTT Agrifood Research Finland, FI-31600 Jokioinen, Finland. Electronic address: elina.tampio@mtt.fi.
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